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<head>
    <title>响应式工具</title>
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<div class="container" style="padding: 40px;">
    <div class="row visible-on">
        <div class="col-xs-6 col-sm-3" >
            <span class="hidden-xs">特别小型设备隐藏</span>
            <span class="visible-xs">✔在特别小型设备上可见</span>
        </div>
        <div class="col-xs-6 col-sm-3" >
            <span class="hidden-sm">小型设备隐藏</span>
            <span class="visible-sm">✔在小型设备上可见</span>
        </div>
        <div class="clearfix visible-xs"></div>
        <div class="col-xs-6 col-sm-3" >
            <span class="hidden-md">中型设备隐藏</span>
            <span class="visible-md">✔在中型设备上可见</span>
        </div>
        <div class="col-xs-6 col-sm-3" >
            <span class="hidden-lg">大型设备隐藏</span>
            <span class="visible-lg">✔在大型设备上可见</span>
        </div>
    </div>
</div>
</body>
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